Not personally but I have known two blokes from my branch leave for the RNZN as Combat System Specialists and come back at the first opportunity claiming they were farmed out at every opportunity and treated as second class citizens. They weren't enamoured at all by the experience. One of those blokes was a total throbber though so I took his Kiwi Navy dits with a pinch of salt, the other however is a good honest bloke who told it pretty much the same way.